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The first recycling shower, operated by a hand pump, was patented in England in 1767 by the stove maker William Feetham. [1] This recycling shower used the pump to push the water into a basin above the user's head. To receive the water, the user pulled a chain to release the water from the basin.
A shower head is a perforated nozzle that distributes water over solid angle a focal point of use, generally overhead the bather. A shower uses less water than a full immersion in a bath. Some shower heads can be adjusted to spray different patterns of water, such as massage, gentle spray, strong spray, and intermittent pulse or combination modes.
Locher set out to design a rack system that could be used on gradients as steep as 1 in 2 (50%). The Abt system – the most common rack system in Switzerland at the time – was limited to a maximum gradient of 1 in 4 (25%). Locher showed that on steeper grade, the Abt system was prone to the driving pinion over-riding the rack, causing ...
A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.
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Michael Bell (born 1938), together with Melanie Chartoff (born 1950), U.S. – a gray water recycling device for reuse of shower and sink water in the home; Alexander Graham Bell (1847–1922), UK, Canada, and U.S. – telephone; Nikolay Benardos (1842–1905), Russian Empire – arc welding (specifically carbon arc welding, the first arc ...
Since the rail can slightly move up and down, the measurement should be done under load. It is said to be zero crosslevel when there is no difference in elevation of both rails. It is said to be reverse crosslevel when the outside rail of curved track has lower elevation than the inside rail. Otherwise, the crosslevel is expressed in the unit ...
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